| http://www.w3.org/ns/prov#value | - Various attachments and configurations may be used to enhance performance of a desired application, including but not limited to multi-balloon systems for centering the apparatus or limiting the treatment area, fiber optics for directly viewing the treatment area, vacuum systems for waste removal, tubes for delivering aminolevulinic acid (ALA) or other photosensitizers, and other fiber optics for
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